For travel in mid July to Aug 21 going to central Pacific coast areas (Manuel Antonio then north from there), then into Central Highlands, then over to Northern Caribbean side like Tortorguero area....will it be difficult to find budget accomodation with a few days in advance of booking? I want to keep our 5 week trip as flexible as we can. Also, how far in advance do you have to book busses etc. in general? Suggestions?